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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Taxes [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
The income tax provision, for the years ended December 31, differs from that computed using the enacted combined Canadian federal and Nova Scotia and New Brunswick provincial statutory income tax rate for the following reasons:
millions of Canadian dollars | 2018 | 2017
Income before provision for income taxes | $ | 816 | $ | 819
Statutory income tax rate |  | 31% |  | 31%
Income taxes, at statutory income tax rate |  | 253 |  | 254
Deferred income taxes on regulated income recorded as regulatory assets and regulatory liabilities |  | (59) |  | (54)
Foreign tax rate variance |  | (55) |  | 36
Amortization of deferred income tax regulatory liabilities |  | (37) |  | -
Florida state tax apportionment adjustment |  | (23) |  | -
Tax effect of equity earnings |  | (15) |  | (12)
Financing deductions |  | (4) |  | (17)
Revaluation of US non-regulated deferred income taxes due to tax reform |  | - |  | 317
Other |  | 9 |  | (4)
Income tax expense (recovery) | $ | 69 | $ | 520
Effective income tax rate |  | 8% |  | 63%
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
millions of Canadian dollars | 2018 | 2017
Current income taxes |  |  |  |
Canada | $ | 3 | $ | 24
United States |  | (121) |  | 24
Other |  | 2 |  | 3
Deferred income taxes |  |  |  |
Canada |  | 11 |  | 3
United States |  | 211 |  | 384
Other |  | (3) |  | (1)
Operating loss carryforwards |  |  |  |
Canada |  | (33) |  | (40)
United States |  | - |  | (194)
Other |  | (1) |  | -
Revaluation of US non-regulated deferred income taxes |  |  |  |
United States |  | - |  | 317
Income tax expense (recovery) | $ | 69 | $ | 520
The following reflects the composition of income before provision for income taxes presented in the Consolidated Statements of Income for the years ended December 31:
millions of Canadian dollars | 2018 | 2017
Canada | $ | 127 | $ | 88
United States |  | 646 |  | 693
Other |  | 43 |  | 38
Income before provision for income taxes | $ | 816 | $ | 819
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
The deferred income tax assets and liabilities presented in the Consolidated Balance Sheets as at December 31 consisted of the following:
millions of Canadian dollars | 2018 | 2017
Deferred income tax assets: |  |  |  |
Tax loss carryforwards | $ | 917 | $ | 853
Tax credit carryforwards |  | 269 |  | 314
Regulatory liabilities - cost of removal |  | 206 |  | 208
Pension and post-retirement liabilities |  | 126 |  | 112
Derivative instruments |  | 90 |  | 107
Other |  | 441 |  | 394
Total deferred income tax assets before valuation allowance |  | 2,049 |  | 1,988
Valuation allowance |  | (163) |  | (105)
Total deferred income tax assets after valuation allowance | $ | 1,886 | $ | 1,883
Deferred income tax (liabilities): |  |  |  |
Property, plant and equipment | $ | (2,591) | $ | (2,321)
Derivative instruments |  | (124) |  | (155)
Other |  | (316) |  | (292)
Total deferred income tax liabilities | $ | (3,031) | $ | (2,768)
Consolidated Balance Sheets presentation: |  |  |  |
Long-term deferred income tax assets | $ | 175 | $ | 138
Long-term deferred income tax liabilities |  | (1,320) |  | (1,023)
Net deferred income tax liabilities | $ | (1,145) | $ | (885)
Summary of Tax Credit Carryforwards [Table Text Block] |
Emera’s net operating loss (“NOL”), capital loss and tax credit carryforwards and their expiration periods as at December 31, 2018 consisted of the following:
| Gross Tax | Unrecognized | Net Tax | Expiration
millions of Canadian dollars | Carryforwards | Amounts | Carryforwards | Period
Canada |  |  |  |  |  |  |
NOL | $ | 817 | $ | (405) | $ | 412 | 2027-2038
Capital loss |  | 86 |  | (77) |  | 9 | Indefinite
United States |  |  |  |  |  |  |
Federal NOL | $ | 2,848 | $ | - | $ | 2,848 | 2024-2037
State NOL |  | 1,314 |  | (47) |  | 1,267 | 2024-2038
Capital loss |  | 6 |  | (6) |  | - | 2019
Tax credit |  | 268 |  | - |  | 268 | 2019-Indefinite
Other |  |  |  |  |  |  |
NOL | $ | 34 | $ | (34) | $ | - | 2019-2025
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
millions of Canadian dollars | 2018 | 2017
Balance, January 1 | $ | 19 | $ | 18
Increases due to tax positions related to a prior year |  | 8 |  | -
Decreases due to tax positions related to a prior year |  | (1) |  | -
Increases due to tax positions related to current year |  | - |  | 1
Balance, December 31 | $ | 26 | $ | 19

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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